Cape May at BC- Breakfast has Minnie, Goofy and Donald. It's one of the more relaxed character meals. The food and interaction are usually very good, sometimes it's a pain to get to if you're using Disney transportation.
1900 PF at GF- Breakfast usually has Mary Poppins, Alice, the Mad Hatter, Pooh and Tigger. The food is good and the characters can be a lot of fun. The dinner usually has Cinderella, PC, LT and the step-sisters. Also has really good character interaction, but we don't care for the food.
Chef Mickey's at CR- Breakfast and Dinner both feature the Fab-5 (Mickey, Minnie, Pluto, Goofy, Donald). We like the breakfast but the dinner is pretty bad. It's a great way to see all of the Fab-5 in 1 sitting.
'Ohana at Poly- Breakfast has Lilo, Stitch, Mickey and Pluto. I personally don't like it, but then again I also don't like Lilo or Stitch. I have put up with it for my girlfriend.
I would highly suggest Chef Mickey's for the experience. I'm sure your DS would love it. I would also go with 1900 PF breakfast because the characters are a lot of fun.